IT1090447B - IMPROVEMENT IN TELEPHONE CIRCUITS - Google Patents

IMPROVEMENT IN TELEPHONE CIRCUITS

Info

Publication number
IT1090447B
IT1090447B IT51936/77A IT5193677A IT1090447B IT 1090447 B IT1090447 B IT 1090447B IT 51936/77 A IT51936/77 A IT 51936/77A IT 5193677 A IT5193677 A IT 5193677A IT 1090447 B IT1090447 B IT 1090447B
Authority
IT
Italy
Prior art keywords
improvement
telephone circuits
telephone
circuits
Prior art date
Application number
IT51936/77A
Other languages
Italian (it)
Original Assignee
Jeumont Schneider
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jeumont Schneider filed Critical Jeumont Schneider
Application granted granted Critical
Publication of IT1090447B publication Critical patent/IT1090447B/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/005—Interface circuits for subscriber lines

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Telephonic Communication Services (AREA)
IT51936/77A 1976-11-25 1977-11-24 IMPROVEMENT IN TELEPHONE CIRCUITS IT1090447B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7635606A FR2372554A1 (en) 1976-11-25 1976-11-25 SUBSCRIBER LINE EQUIPMENT FOR TELEPHONE CENTRAL

Publications (1)

Publication Number Publication Date
IT1090447B true IT1090447B (en) 1985-06-26

Family

ID=9180323

Family Applications (1)

Application Number Title Priority Date Filing Date
IT51936/77A IT1090447B (en) 1976-11-25 1977-11-24 IMPROVEMENT IN TELEPHONE CIRCUITS

Country Status (21)

Country Link
US (1) US4133986A (en)
JP (1) JPS5368108A (en)
AT (1) AT364391B (en)
AU (1) AU508108B2 (en)
BE (1) BE861080A (en)
BR (1) BR7707753A (en)
CA (1) CA1074935A (en)
CH (1) CH619578A5 (en)
DD (1) DD134301A5 (en)
DE (1) DE2751444C3 (en)
ES (1) ES464223A1 (en)
FR (1) FR2372554A1 (en)
GB (1) GB1538017A (en)
HK (1) HK5980A (en)
IT (1) IT1090447B (en)
LU (1) LU78569A1 (en)
MX (1) MX143397A (en)
NL (1) NL185435C (en)
OA (1) OA05805A (en)
SE (1) SE421577B (en)
ZA (1) ZA777006B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7802421A (en) * 1978-03-06 1979-09-10 Philips Nv POWER SUPPLY FOR A SUBSCRIPTION LINE CURRENT.
FR2422300A1 (en) * 1978-04-03 1979-11-02 Trt Telecom Radio Electr CONNECTOR CONTAINING A SYMMETRICAL POWER AMPLIFIER TO SUPPLY THE SUBSCRIBER LINE
US4433215A (en) * 1979-02-26 1984-02-21 Tii Corporation Solid state hybrid circuits
US4387273A (en) * 1980-08-25 1983-06-07 International Telephone And Telegraph Corporation Subscriber line interface circuit with impedance synthesizer
DE3237652A1 (en) * 1982-10-11 1984-04-12 Siemens AG, 1000 Berlin und 8000 München TELEPHONE SYSTEM
US10720996B2 (en) * 2016-08-19 2020-07-21 Fujitsu Limited Frequency characteristic adjustment circuit, optical transmission module using the same, and optical transceiver

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT291356B (en) * 1969-05-09 1971-07-12 Itt Austria Circuit arrangement for the automatic maintenance of the symmetry of supply circuits for subscriber stations in telecommunication systems using transistors
FR2305080A1 (en) * 1975-03-20 1976-10-15 Jeumont Schneider ELECTRONIC TERMINER
DE2556157C3 (en) * 1975-12-11 1979-01-18 Deutsche Telephonwerke Und Kabelindustrie Ag, 1000 Berlin Circuit arrangement for an electronic subscriber feed

Also Published As

Publication number Publication date
AU3075877A (en) 1979-05-24
AT364391B (en) 1981-10-12
CH619578A5 (en) 1980-09-30
ZA777006B (en) 1978-09-27
FR2372554A1 (en) 1978-06-23
DE2751444C3 (en) 1982-02-18
MX143397A (en) 1981-04-30
SE421577B (en) 1982-01-04
NL7712719A (en) 1978-05-29
LU78569A1 (en) 1978-04-20
DD134301A5 (en) 1979-02-14
JPS5368108A (en) 1978-06-17
BE861080A (en) 1978-03-16
NL185435B (en) 1989-11-01
FR2372554B1 (en) 1981-02-20
DE2751444B2 (en) 1981-05-14
US4133986A (en) 1979-01-09
OA05805A (en) 1981-05-31
NL185435C (en) 1990-04-02
AU508108B2 (en) 1980-03-06
ES464223A1 (en) 1978-07-01
GB1538017A (en) 1979-01-10
DE2751444A1 (en) 1978-06-01
ATA808677A (en) 1981-03-15
CA1074935A (en) 1980-04-01
HK5980A (en) 1980-02-29
BR7707753A (en) 1978-08-01
SE7713305L (en) 1978-05-26

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